Note: This gold tanka of Nasir ud-din Mahmud, bearing the Arabic legend "Khuld Allahu Mulkahu," represents a previously UNPUBLISHED Type. No other gold coins of Nasir ud-Din Mahmud from the mint of Khalifatabad have been recorded in any standard catalogues or references to date.

This discovery marks the first Known Example featuring this legend and this exceedingly Rare Bengal Sultanate mint, offered now for the first time at auction. The coin bears a clearly legible date of AH 846. A comparative silver tanka from this series is catalogued by Goron and Goenka as B461.

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